in_cksum et al.

Submitted by:	Peter Grehan <peterg@ptree32.com.au>

1 files changed, 80 insertions, 0 deletions

diff --git a/sys/powerpc/include/in_cksum.h b/sys/powerpc/include/in_cksum.h
new file mode 100644
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+++ b/sys/powerpc/include/in_cksum.h
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+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from tahoe:	in_cksum.c	1.2	86/01/05
+ *	from:		@(#)in_cksum.c	1.3 (Berkeley) 1/19/91
+ *	from: Id: in_cksum.c,v 1.8 1995/12/03 18:35:19 bde Exp
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_IN_CKSUM_H_
+#define	_MACHINE_IN_CKSUM_H_	1
+
+#include <sys/cdefs.h>
+
+#define in_cksum(m, len)	in_cksum_skip(m, len, 0)
+
+/*
+ * It it useful to have an Internet checksum routine which is inlineable
+ * and optimized specifically for the task of computing IP header checksums
+ * in the normal case (where there are no options and the header length is
+ * therefore always exactly five 32-bit words.
+ */
+#ifdef __GNUC__
+
+static __inline void
+in_cksum_update(struct ip *ip)
+{
+	int __tmpsum;
+	__tmpsum = (int)ntohs(ip->ip_sum) + 256;
+	ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16));
+}
+
+#else
+
+#define	in_cksum_update(ip) \
+	do { \
+		int __tmpsum; \
+		__tmpsum = (int)ntohs(ip->ip_sum) + 256; \
+		ip->ip_sum = htons(__tmpsum + (__tmpsum >> 16)); \
+	} while(0)
+
+#endif
+
+#ifdef _KERNEL
+u_int in_cksum_hdr(const struct ip *ip);
+u_short	in_addword(u_short sum, u_short b);
+u_short	in_pseudo(u_int sum, u_int b, u_int c);
+u_short	in_cksum_skip(struct mbuf *m, int len, int skip);
+#endif
+
+#endif /* _MACHINE_IN_CKSUM_H_ */